9 definitions
by
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A cinematic technique that uses misdirection to lead to an ending that is at first glance completely unexpected or contradictory, but is coherent and reasonable given hindsight and careful observation of the clues presented.

A betrayalaton is a videogame industry announcement or rumor similar to a megaton, but more specific in that it involves an highly valuable exclusive game, game series, or gaming company switching platforms or going multiplatform.